Burn, Shrimp swim with very little "action"...they swim with the little legs underneath their tail. Your Shrimp plastics "swim" with a very natural "shrimp action" already. Do things how You see fit, of course, but know that Your baits are already doing very well in the way of swimming naturally when they're retrieved. And DO NOT limit Yourself to bouncing a Shrimp along the bottom. When the Shrimp are on the move, present a Shrimp plastic almost the same as a minnow imitation, just without the twitching. Shrimp don't dart "in forward", they only dart when they jump backwards. A slow, steady retrieve, maybe with some slow-slow-twitching, is all it takes to make it imitate a Shrimp. The only side-to-side that Shrimp do is about like someone making a slow turn on a skateboard...they kind of veer while they're pushing forward.
Just know that Your Shrimp already have most of their natural "action" (or lack there-of) built in the bait. My jaw will drop when someone offers a mold that we can shoot that has the little swimming legs beneath the tail, that actually swim...and not curltails (I've seen that already).
